Artists have made a beautiful animation of what the human body looks like doing yoga in X-ray form. The animators strived to make the video as scientifically accurate as possible, working with medical experts to create a 3D visual study of the human skeleton.

When we think about the value of exercise, we tend to focus on the physical benefits. Lower blood pressure, a healthier heart, a more attractive physique. But over the past decade, social scientists have quietly amassed compelling evidence suggesting that there is another, more immediate benefit of regular exercise: its impact on the way we think.

Walking may never become as trendy as CrossFit, as sexy as mud runs or as ego-boosting as Ironman races but for fitness experts who stress daily movement over workouts and an active lifestyle over weekends of warrior games, walking is a super star.